I've been using the overdrive app since it was released with no problems, until about a week ago. Now, I can login to my library and check out books, but they won't download. When I go to my bookshelf and click on any of the books 'download' buttons, the buttons momentarily change color (so they were pressed), but then nothing at all happens. No errors, no actual downloading, nothing at all. I have the upgraded app (which I don't like) but I have downloaded successfully since the upgrade so the upgrade itself didn't break this functionality. Has anyone else had this problem? If so, what is the fix? Thanks!